House Underpinning: FOUR Causes of Foundation Failure

January 29, 2021 / 0 Comments / by admin

Over the course of time, a lot of things can go wrong with your house foundation. The foundation could become unstable and lead to serious problems such as cracks in floors and walls, stairs that come away from the front porch, doors and windows that won’t open and more.

Here are the four main causes of foundation failure:

Soil Type

Almost all types of expansive clay can absorb huge quantities of water and as a result they can swell or expand exponentially. The pressure created due to this extreme swelling can without much of a stretch lift most residential homes. There’s likewise an electro-magnetic component that further adds to the swelling. The specialised term for when this swelling lifts or pushes foundations upward is “heave”. The problem at hand escalates because the soils not only expand due to moisture but also contract with drying up – leading to unpredictable up and down movements known as differential settlement. Foundation underpinning is needed to stabilise the foundations and to preserve the structural integrity. When it comes to house underpinning in Sydney, you need to hire specialists, who are well equipped to get the work done efficiently, quickly and safely.

Poorly Compacted Fill Material

On the off chance that the fill material on a plot isn’t adequately compacted to bear the weight of the structure above it, then it highly likely that there will be foundation problems. This can happen due to the blend of odd fill materials, and from inadequately compacted fill, or a mix of both. If you’re picking a land to build on, then try to see it before it is built. By doing this you will have time to approve the fill material and the degree of compact required.

Slope Failure / Mass Wasting

In Geology, the term “mass wasting” means the movement of earth downhill. This could either be “creep” which is slow, or “landslides” which are unexpected and sudden. Slope failure as we use it alludes to “creep”. Underpinnings can to a certain extent act as a protective shield against “creep” but the force of gravity is such that the underpinnings are ineffective unless they were explicitly intended to stop slope failure. Warranties can’t for the most part cover underpinnings in locales having slope failure.


This is one of the most common causes of foundation failure. Erosion can occur due to absence of ground cover, poor drainage or uncontrolled water flow. If not spotted early, erosion can erode or wear away the soil around foundations. Over time, this can weaken the foundations and make them unstable. Underpinning can increase the strength of the foundation and allow it to take more pressure. It is a highly effective repair process to restore the strength of the foundations.

When it comes to house underpinning in Sydney, work with companies like Best Underpinning, who have the knowledge, experience, equipment, skills and expertise to handle underpinning projects of all sizes, types and complexities.


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